Pocket-ma p



No Model!) B. L. STEVENS. POCKET MAP.

No. 533,324. Patented Jan. 29, 1395.

[Wen/Z07". .Eo ZerZ' l. 495806728 AitarzzefJ NITED STATES 'ATENT FFICE.

POCKET-MAP.

SPECIFICATION forming part of Letters Patent No. 533,324, dat'edJanuary29, 1 895.

Application filed May 28, 1894. Sen'al No- 512,663. (No model.)

To aZZ whom it may concern.-

. Be it known that I, ROBERT L. STEVENS, residing at Ward, in the countyof Delaware and State of Pennsylvania, have invented a new and ImprovedPocket-Map, of which the following is a specification.

My invention isin the nature of a combined microscopic and photographmap holder for travelers, bicyclists, tourists, &c., and it hasprimarily for its object to provide a device of this kind of a verysimple and economical structure, in its outer contour, like that of anordinary watch case, whereby it can be conveniently carried in thepocket.

It has also for its object to provide a device of this kind in which aseries of maps are interchangeably held, and in which the vision orfocal point can be moved over the map to any desired point.

\Vith other minor objects in View which hereinafter will be referred to,my invention consists in the novel construction and pe culiarcombination of parts as will be first described in detail and thenspecifically pointed out in the appended claims, reference being had totheaccompanying drawings, in which- Figure 1 is a face View of myimproved map holding device. Fig. 2 is a transverse section thereof onthe line 2, 2 Fig. 1; Fig. 3 is a rear face view of a modified form oflens holder, the same being shown as removed from the casing. Fig. 4 isa transverse section thereof, and Fig. 5 is a View of a furthermodification hereinafter referred to.

In the construction shown in Figs. 1 and 2, A indicates a casing thebottom or back portion of which is formed of a glass plate B, on

Y which may be held, fixedly or detachably the map 0, printed preferablyon a translucent body, and such glass plate and map are detachably heldon the said casing by means of an annular ring member as shown in Fig. 2or by other desired means. To the casing A is hinged a map holdingpocket D, the hinge d of which extends slightly rearward, whereby suchpocket is held away from the glass plate B, so as not to interfere withthe light, and such pocket has a catch member 01' which is adapted tofold over the pocket and also to connect with the casing A as shown.

To the basin g A is attached the microscopic lens devices, which may bein the nature of carried in the pocket by the cap piece H pivoted to theguide piece as shown.

Instead of connecting a movable lens memher to the casing the modifiedarrangement of lens devices shown in Figs. 3 and 4, may be employedwhich comprises a body portion A, on the back end of which is adapted tobe detachably held the glass plate and the map.

In the arrangement shown in Figs. 3 and 4 the maps are preferablydivided into a series of squared spaces.

B B indicate a series of lenses having flat squared ends whichpractically join at the rear to form a flat face against which the mapis held, and such lenses taper and terminate in small circular visualpoints I)", the spaces between such points being opaque to relieve thelight from the eye-and permit it to shine only through the lens B.

By arranging the devices as shown in Figs. 3 and L I am enabled to takea micro map printed from a negative, in which the parts of the map showas a consecutive whole, though completely disunited, (that is, the oneprint has disconnected parts of the same map, while thelenses exhibit itas acomplete whole.) This arrangement enables the user to examine anyparticular portion of the complete map (magnified) it being understoodthat in so doing he uses but one eye, it being manifestly clear thatsuch arrangement materially differs from the steroscopic lens devices,in that, with a stereoscope both eyes must be used and the entire map(or View) taken in at one glance.

A further modification of my invention is shown at Fig. 5, in which acentral lens B joined to a collapsible top plate E made in sectionsjoined likea collapsible drinking cup is provided, whereby the lens canbe drawn outward, and also to permit of the employment of as many lensesas can collect light, and also to permit the said plate E being foldedfiat, when the device is not in use.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A pocket map holder, comprising a lens holding portion, having a lensremovably held therein, and a translucent map holding means, and a mapholding pocket held on the map holding end and spaced apart therefromand described.

3. An improved pocket map holder, comprising a body having a translucentmap holding means at one end and a series of lenses,

disunited at the focal or optical point, but practically joined at themap end substantially as shown and described.

4; An improved pocket map holder comprising a casing like member havinga series of lenses, disconnected at their optical or focal points,disposed at one end of the casing, but joined to form a consecutivewhole at the opposite end, a translucent map holding means on the joinedend of the lenses, anda map holding casing secured over the translucentmap holding end of the casing but held spaced therefrom whereby to admitthe light between it and such map end all arranged substantially asshown and for the purposes described.

ROBERT L. STEVENS. Witnesses: J. W. HAWLEY,

A. P. OTTEY.

